From 75552bd3bb4e7f3cf4dab81a5c81cf73b1d3fb99 Mon Sep 17 00:00:00 2001 From: Scott Lystig Fritchie Date: Fri, 17 Aug 2012 03:24:20 -0500 Subject: Relocate bodies of DTrace probes to the statically-linked VM. Due to various operating systems (in both the DTrace and SystemTap worlds) not fully supporting DTrace probes (or SystemTap-compatibility mode probes) in shared libraries, we relocate those probes to the statically-linked virtual machine. This could be seen as pollution of the pristine VM by a (yet) experimental feature. However: 1. This code can be eliminated completely by the C preprocessor. 2. Leaving the probes in the dyntrace NIF shared library simply does not work correctly on too many platforms. *Many* thanks to Macneil Shonle at Basho for assisting when my RSI-injured fingers gave out. Tested on: * CentOS 5, SystemTap 1.3 * Solaris 10 (note) * Solaris 11 * OpenIndiana 151 * SmartOS 20120809T221258Z * FreeBSD 9.0-RELEASE (note) I had hoped to be able to test CentOS 6 + SystemTap 1.7, but the details of dealing with all dependencies for a 2.6.32-279.5.1.el6.x86_64 kernel are too time consuming right now. (note: Solaris 10 and FreeBSD 9.0-RELEASE can take a long time to compile) --- lib/runtime_tools/examples/user-probe-n.d | 44 +++++++++++++++++++ lib/runtime_tools/examples/user-probe-n.systemtap | 53 +++++++++++++++++++++++ lib/runtime_tools/examples/user-probe.systemtap | 4 +- 3 files changed, 99 insertions(+), 2 deletions(-) create mode 100644 lib/runtime_tools/examples/user-probe-n.d create mode 100644 lib/runtime_tools/examples/user-probe-n.systemtap (limited to 'lib/runtime_tools/examples') diff --git a/lib/runtime_tools/examples/user-probe-n.d b/lib/runtime_tools/examples/user-probe-n.d new file mode 100644 index 0000000000..06a3e5c9b9 --- /dev/null +++ b/lib/runtime_tools/examples/user-probe-n.d @@ -0,0 +1,44 @@ +/* example usage: dtrace -q -s /path/to/user-probe.d */ +/* + * %CopyrightBegin% + * + * Copyright Scott Lystig Fritchie 2011-2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ + +erlang*:::user_trace-n0 +{ + printf("probe n0: %s %s %d %d %d %d '%s' '%s' '%s' '%s'\n", + copyinstr(arg0), + arg1 == NULL ? "" : copyinstr(arg1), + arg2, arg3, arg4, arg5, + arg6 == NULL ? "" : copyinstr(arg6), + arg7 == NULL ? "" : copyinstr(arg7), + arg8 == NULL ? "" : copyinstr(arg8), + arg9 == NULL ? "" : copyinstr(arg9)); +} + +erlang*:::user_trace-n1 +{ + printf("probe n1: %s %s %d %d %d %d '%s' '%s' '%s' '%s'\n", + copyinstr(arg0), + arg1 == NULL ? "" : copyinstr(arg1), + arg2, arg3, arg4, arg5, + arg6 == NULL ? "" : copyinstr(arg6), + arg7 == NULL ? "" : copyinstr(arg7), + arg8 == NULL ? "" : copyinstr(arg8), + arg9 == NULL ? "" : copyinstr(arg9)); +} + diff --git a/lib/runtime_tools/examples/user-probe-n.systemtap b/lib/runtime_tools/examples/user-probe-n.systemtap new file mode 100644 index 0000000000..6aa415bb67 --- /dev/null +++ b/lib/runtime_tools/examples/user-probe-n.systemtap @@ -0,0 +1,53 @@ +/* + * %CopyrightBegin% + * + * Copyright Scott Lystig Fritchie and Andreas Schultz, 2011-2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ +/* + * Note: This file assumes that you're using the non-SMP-enabled Erlang + * virtual machine, "beam". The SMP-enabled VM is called "beam.smp". + * Note that other variations of the virtual machine also have + * different names, e.g. the debug build of the SMP-enabled VM + * is "beam.debug.smp". + * + * To use a different virtual machine, replace each instance of + * "beam" with "beam.smp" or the VM name appropriate to your + * environment. + */ + +probe process("beam").mark("user_trace-n0") +{ + printf("probe n0: %s %s %d %d %d %d '%s' '%s' '%s' '%s'\n", + user_string($arg1), + $arg2 == NULL ? "" : user_string($arg2), + $arg3, $arg4, $arg5, $arg6, + $arg7 == NULL ? "" : user_string($arg7), + $arg8 == NULL ? "" : user_string($arg8), + $arg9 == NULL ? "" : user_string($arg9), + $arg9 == NULL ? "" : user_string($arg9)); +} + +probe process("beam").mark("user_trace-n1") +{ + printf("probe n1: %s %s %d %d %d %d '%s' '%s' '%s' '%s'\n", + user_string($arg1), + $arg2 == NULL ? "" : user_string($arg2), + $arg3, $arg4, $arg5, $arg6, + $arg7 == NULL ? "" : user_string($arg7), + $arg8 == NULL ? "" : user_string($arg8), + $arg9 == NULL ? "" : user_string($arg9), + $arg9 == NULL ? "" : user_string($arg9)); +} diff --git a/lib/runtime_tools/examples/user-probe.systemtap b/lib/runtime_tools/examples/user-probe.systemtap index b41d7483ad..0482235324 100644 --- a/lib/runtime_tools/examples/user-probe.systemtap +++ b/lib/runtime_tools/examples/user-probe.systemtap @@ -28,12 +28,12 @@ * environment. */ -probe process("dyntrace.so").mark("user_trace-s1") +probe process("beam").mark("user_trace-s1") { printf("%s\n", user_string($arg1)); } -probe process("dyntrace.so").mark("user_trace-i4s4") +probe process("beam").mark("user_trace-i4s4") { printf("%s %s %d %d %d %d '%s' '%s' '%s' '%s'\n", user_string($arg1), -- cgit v1.2.3